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    Neutral Density (ND) Filters

    ND Filters, also known as Neutral Density Filters, are often used in imaging or laser applications where excessive light can be damaging to camera sensors or other optical components. ND Filters are also ideal for preventing excessive light from causing inaccurate results in photometer applications. ND Filters are designed to reduce transmission evenly across a portion of the spectrum by absorbing or reflecting the portion of the light that is not being transmitted.

    Edmund Optics offers a wide variety of Neutral Density Filters for Ultraviolet (UV), Visible, or Infrared (IR) applications. Neutral Density Filter Kits are available, which include a number of filters in a range of optical densities. By stacking Neutral Density Filters, the optical density can be increased. Stepped ND Filters are also available. Stepped Optical Filters offer a number of optical densities on a single filter, ideal for lab or R&D integration.


    Absorptive Neutral Density (ND) Filters
    • Attenuates Visible Light Via Absorption, Rather than Reflection
    • Multiple Filters Can be Stacked for Increased Blocking
    • Optical Densities from 0.1 to 4.0 are Available

    UV-NIR Neutral Density Filters
    • Constant Transmission from 190 – 1700nm
    • Can be Stacked to Create Intermediate Density Values
    • Multiple Optical Densities Available

    UV-VIS Neutral Density (ND) Filters
    • Ideal for 250-700nm Sources
    • Optical Densities Ranging from 0.3 to 3.0

    Near-IR (NIR) Neutral Density (ND) Filters
    • Ideal for NIR Wavelengths 700-1100nm
    • Optical Densities Ranging from 0.3 to 3.0

    Reflective Neutral Density (ND) Filters
    • Spectrally Flat
    • Maximum Accuracy and Neutrality at Moderate Price
    • Use Stacks to Create Intermediate Density Values

    Non-Reflective Neutral Density (ND) Filters
    • Prevent Unwanted Reflection Towards the Light Source
    • Spectrally Flat
    • VIS and NIR Ranges Available

    Infrared (IR) Neutral Density (ND) Filters
    • Spectrally Flat from 2μm to 14μm
    • Precision Germanium Substrate

    Kodak Wratten 2 Neutral Density Filters
    • Available in Large Sizes
    • Easily Cut for Custom Sizing
    • Kodak Filter No. 96

    Laminated Neutral Density (ND) Filter Film
    • High Rigidity and Durability
    • Anti-Reflection (AR) Coated to Reduce Glare
    • Easy to Handle and Mount

    Continuously Variable Neutral Density Filters
    • Continuous Linear Adjustment of Optical Density
    • Use in Pairs to Control Beam Transmission
    • Ideal for 400 - 700nm

    Stepped Neutral Density (ND) Filters
    • 11 Discrete Density Steps
    • Design Wavelength of 400 - 700nm
    • Density Neutrality of ±5%

    Circular Variable Filters
    • Continuously Variable Over 270°
    • Spectrally Flat from 400-700nm
    • Mounted and Unmounted Versions Available

    Mounted Circular Neutral Density (ND) Filters
    • Complete Package
    • Smooth Rotation

    Continuously Variable Apodizing Filters
    • Bull’s Eye Filter Type Decreases Radially from Center
    • Reverse Bull’s Eye Type Increases Radially from Center
    • Ideal for Eliminating Intensity Variations in Optical Systems

    Mounted Absorptive Neutral Density (ND) Filters
    • Spectrally Flat from 400-700nm
    • Homogeneous Glass: Blocks by Absorption
    • Light/Exposure Control for Imaging

    M25.5 and M30.5 Mounted Neutral Density Filters
    • VIS and NIR ND Filters, Mounted for Imaging Lenses
    • Variety of Optical Densities
    • Stack Filters Together for Custom Transmission Profiles

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